I can't do any dubs or anything crazy. But for reg spins and corks I've always found blunt to be the easiest grab. It takes the least amount of effort because you just bend your knee, look back, and the tail of your ski just comes to your hand- you'd don't have to reach for the grab at all like with safety's, mute's, or basically any other grab I can think of. But most of my friends think blunts are hard and I feel like its the general consensus. I can see it being hard with a trick you have to tuck, but otherwise idk- maybe people just overthink it. Or maybe its just one of those things where its just a grab that works for me.
When I first was learning grabs with spins I went for safety because everyone says its the easiest. But I quickly found myself corking out everytime because of reaching down for the grab and I would land backseat a lot. Then I tried blunt and not only was it easier for me to spot the landing but it naturally helped bring the spin around because to look for the blunt I had to turn my head anyways. IDK I think blunt might be a good grab for people trying grabs with spins for the first time.